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It has long been touted that 3D printers will cause a manufacturing revolution, a device that could be a mini-factory within your home. That day may be closer after a suite of affordable new devices were unveiled yesterday that can “print” objects - large and small.

Makerbot, the New York-based maker of 3D printers, released three new models, including a machine that is able to print items the size of someone’s head.

Bre Pettis, chief executive of Makerbot, said the Replicator Z18, could print objects that were six times larger than previous versions of its machine. “If you’ve been hampered with